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| Part 1 | General Information |
|---|---|
| Part 2 | General Information (continued) |
| Part 3 | General Information (continued) Brimar TP1 and TP2 |
| Part 4 | GEC GET1, GET2 and GW51 RCA 2N33 |
| Part 5 | Brimar TJ1, TJ2 and TJ3 Hivac XFT1 Mullard OC70 and OC71 |
| Part 6 | Pye V10/15, V10/30, V10/50 RCA 2N34 |
